Screw driver



1,678,124 G. PERREAU LT SCREW DRIVER Jul 24. 1928.

Original'Filed DeC. 29, 1925 Patented July 24, 1928.

a c iral STATES- PATENT. OFFICE.

GEDEON rnnnnaulmor eannnnn; MASSACHUSETTS.

sonnw DRIVER.

Application filed December 29,1925, Serial No. 78,228 Renewed Novembert', 1927. a

This invention relates to a, combination drill and screw driver and theprincipalobjects thereof are to. provide a simple and inexpensiveconstruction in which the two instrun'ientscan be mounted in the sameholder in such a way that the drill or bit, by itself, can be usedconveniently in the usual way, and yet a screwdriver holder of verysimple construction and having a yielding support up to a certain pointcan be attached to it and used without dismounting the drill.

Other objects and advantagesof the invention will appear hereinafter.

Reference is to be had to the accompany ing drawings, in which Fig. 1 isa longitudinal central sectional view of a holder on enlarged scale,constructed in accordance with this invention;

Fig. 2 is a side view of the drill portion; and

Figs. 3, 4 and 5 are sectional views on the lines 33, 1-1- and 55respectively of Fig. 1.

The invention is shown as applied to an ordinary head having a squarecross section to fit in a correspondingly shaped socket and providedwith a neck 11 and a cylindri cal part 12. This has a cylindrical socketfor holding a drill 13 or a bit and is provided with a set screw 14 inthe neck 11 for engaging the shank of the drill and holding it firmly inposition as shown in Fig. 2. This arrangement is all that is used ofthis tool for drilling purposes.

By reference to Fig. 1 it will be seen that the same elements areretained in every way without adjustments or. modification, but I havemounted on the cylindrical part .12 a tube 15. This is secured inposition thereon by a screw 16 in a well known way. Mounted in this tubeis a tubular member 17 which has an enlarged head 18 under which is aspring 19 surrounding the shank of the member. In the end the member isprovided with a blade20 which constitutes a screw driver and is locateddiametrically.

This tubular member is also provided with a central passage 21 extendingalmost all the way through it for receiving the drill 13 when the partsare assembled. A screw 30 holds the head 18.

In themouth of the tube 15 is placed another tube 23. This is securedslidingly in position between the surfaces of the member 17 and the tube15. It is provided with a slot 24: for receiving the inturned end of awire spring 25 which is located in a vcircumfei 'ential slot 26 on'thecircun'ifere'nce of the tube 15. This will hold the tube 23 from slidingbeyond two limiting positions. Thisitube23 is provided with a head 26which is knurled on the outside and screw threaded on the inside for anobvious purpose as shown. It is provided with a conical inner surface 27for engaging the screw on which it is to be used. When the parts arefixed in the positions just described, the tube 28 will yield when thesurface 27 is placed against a screw head and allow the screw driverblade 20 to come into position and operate upon the screw. The tube 15is provided with a perforation for receiving a screw 30 for tighteningit on the head 18 and securing the member 17 in fixed position. As hasbeen described above, the tube 15 with its connected parts can bereipofied and then the device will operate as a cri It will be seen thatthis constitutes an attachment to be applied to a drill head and drill,without removing the drill therefrom, for holding the screw driver witha yieldable collar. It is a very simple construction and easily appliedto the drill. hen in position the drill assists in strengthening thetubular member 17 which supports the screw driver and the tubular memberalso holds the drill in a straight unbent position.

lVhile'I have illustrated and described only a single form of theinvention, I am aware of the fact that modifications can be made thereinby any person skilled in the art without departing from the scope of theinvention as expressed in the claims. Therefore I do not wish to belimited to all the.

details of construction herein shown and described, but what I do claimis 1. In a tool of the character described, the combination with aholder adapted to receive the shank of a tool therein, of a tube fixedthereto and surrounding said tool, a member secured within the tube andhaving a recess or bore for receiving said tool, a slide yieldinglymounted on said member and having a head with a conical inner surfacefor engaging the head of a screw, yielding means located in an annularspace between said member and tube for forcing the slide outwardly and ascrew-driver blade mounted on the end of said member within the head. v

-2. In a tool of thecharacter described, thecombination of a holderadapted to receive the shank of a tool therein, with a tube fixed spacebetween said member and tube for forcing the slide outwardly.

3. In a tool of the character described, the

fixed my signature.

combination of a holder adapted to receive the shank of a tool therein,with a tube fixed thereto and surrounding said tool, a tubular a recessor bore for receiving said tool, a

slide yiel dingly mounted on said tubular member, yielding means in. thetube for forcingthe -slide outwardly, said slide having means forcentering the head of a screw, means on the tube and slide for limitingits motion in both directions, and a screw-driver blade-mounted on theend of said tubular member beyond said bore.

In testimony whereof; I have hereunto afi EDEoN PERREAULT.

